The ZAPCO ST-104D SQ MINI is a 4-channel wideband Class D amplifier designed for those who need significant power without sacrificing space in their vehicle. This compact unit delivers 95 W per channel at 4Ω, which can be increased to 120 W at 2Ω, or bridged to provide 2 x 240 W RMS for more demanding speaker setups. Its high signal-to-noise ratio of over 90 dB and a frequency response ranging from 15 Hz to 30 kHz ensure a clean, accurate sound reproduction with very low distortion. To make installation flexible, the amplifier features both linear RCA and high-level inputs, including an automatic turn-on function triggered by the high-level signal. You can fine-tune the audio using the adjustable input sensitivity and electronic crossover, while an optional HD Bluetooth module allows for wireless connectivity. The entire system is housed in a micro chassis measuring 95 x 37 x 236 mm, making it easy to tuck away in tight spots under a seat or behind a dashboard while still powering a full set of car speakers.